<!DOCTYPE html>
<html lang="zh">
<head>
	<meta charset="UTF-8" />
	<meta name="viewport" content="width=device-width, initial-scale=1.0" />
	<meta http-equiv="X-UA-Compatible" content="ie=edge" />
	<title>Document</title>
</head>
<body>
	<form action="" method="post">
		<input type="text" id="" value=""/>
		<select name="">
			<option value="">10进制转换为2进制</option>
			<option value="">10进制转换为8进制</option>
			<option value="">10进制转换为16进制</option>
			<option value="">2进制转换为10进制</option>
			<option value="">8进制转换为10进制</option>
			<option value="">16进制转换为10进制</option>
		</select> 
		<input type="submit" value="转换" />
		<input type="text" name="" id="" value="" />
	</form>
		<br><br><br><br><br><br>
		
		<form action="" method="post">
		<input type="text" id="" value=""/>
		<select name="">
			<option value="">10进制转换为8进制</option>
		</select> 
		<input type="submit" value="转换" />
		<input type="text" name="" id="" value="" />
	</form>
		<form action="" method="post">
		<input type="text" id="" value=""/>
		<select name="">
			<option value="">10进制转换为16进制</option>
		</select> 
		<input type="submit" value="转换" />
		<input type="text" name="" id="" value="" />
	</form>
		<form action="" method="post">
		<input type="text" id="" value=""/>
		<select name="">
			<option value="">2进制转换为10进制</option>
		</select> 
		<input type="submit" value="转换" />
		<input type="text" name="" id="" value="" />
	</form>
		<form action="" method="post">
		<input type="text" id="" value=""/>
		<select name="">
			<option value="">8进制转换为10进制</option>
		</select> 
		<input type="submit" value="转换" />
		<input type="text" name="" id="" value="" />
	</form>
		<form action="" method="post">
		<input type="text" id="" value=""/>
		<select name="">
			<option value="">16进制转换为10进制</option>
		</select> 
		<input type="submit" value="转换" />
		<input type="text" name="" id="" value="" />
	</form>
</body>
</html>
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